References of "Liénard, Amandine"
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See detailFactors of Variation of Soil Chemical Properties in Metalliferous Ecosystems of Tenke-Fungurume, Katanga, D. R. Congo
Kaya Muyumba, Donato ULiege; Ilunga wa Ilunga, Edouard; Faucon, Michel-Pierre et al

in Tropicultura (in press)

Our study aimed at deepen our understanding of relationships between soil properties and vegetation distribution in metalliferous ecosystems of Tenke-Fungurume in the Democratic Republic of Congo. The ... [more ▼]

Our study aimed at deepen our understanding of relationships between soil properties and vegetation distribution in metalliferous ecosystems of Tenke-Fungurume in the Democratic Republic of Congo. The first question concerned the differences and similarities between soils of the main vegetation units and four variation factors of soil properties were summarized by multivariate analysis. They were all linked to lithology and significantly contributed to explain the distribution of vegetation units. Our result suggest that the variation of soil properties which is observed within the various vegetation units (rocky steppe savanna, sward, and steppe savannas on slope or on Dembo) should partially be attributed to differences of geochemical composition of rocks between sites but the main source of variability is to be found inside each hill. The soil contamination in Cu and Co originates from rock weathering and besides site effect and topographic distribution of the rocks, the variability of soil properties within one vegetation unit may be due to variability of soil parent material and not only to erosion. The second question dealt with the changes of soil properties at small distances. Metric variation was studied from transects between adjacent vegetation units. Our results showed that the abrupt changes of vegetation units which were clearly identified on the field were all truly explained by the variations of one or more properties linked to lithology. The key point being the Cu bioavailability. [less ▲]

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See detailSANISOL, un outil pilote de recommandations aux producteurs de légumes et de fruits sur sol contaminé en Wallonie (Belgique)
Liénard, Amandine ULiege; Fontenoy, Delphine; Pereira, Benoît et al

Conference (2019, March 26)

Objectif Le projet SANISOL, à travers la mise en œuvre d’un outil informatique pilote sur Internet, vise à fournir des recommandations particulières de gestion et d’utilisation à tout producteur de ... [more ▼]

Objectif Le projet SANISOL, à travers la mise en œuvre d’un outil informatique pilote sur Internet, vise à fournir des recommandations particulières de gestion et d’utilisation à tout producteur de biomasse alimentaire (notamment légumes et fruits) sur sols contaminés en Wallonie. Caractère innovant du sujet proposé L’originalité de cette étude repose sur le caractère multidisciplinaire et multi-acteurs de l’approche. Elle mobilise des compétences en matière d’échantillonnage et d’analyses de sols, de légumes et de fruits ainsi qu’un biomonitoring avec prélèvements d’échantillons biologiques (cheveux, sang, urine), le tout en concertation avec les acteurs régionaux et locaux. Les objectifs poursuivis étant de livrer des recommandations adaptées à la production potagère et à la fréquentation des potagers pour les personnes réalisant une activité de jardinage en vue d’une autoconsommation sur sol contaminé. En outre, elle rassemble des acteurs d’horizons différents : des scientifiques (Université de Liège et Université Catholique de Louvain), des organismes d’intérêt public (SPAQuE, ISSeP, Espace Environnement), le secteur associatif et les pouvoirs publics. Résumé Le projet SANISOL s’articule autour de cinq volets : l’étude des transferts sols-plantes en métaux en jardins potagers, le diagnostic du modèle S-Risk© pour la production végétale, un programme d’action Environnement-Santé à l’aide d’un biomonitoring, la configuration d’un outil informatique pilote et une gestion de la communication avec production d’un contenu « Sols potagers pollués » diffusable au grand public. L’association de ses différentes approches permettra la détermination de teneurs limites en polluants dans le sol en vue d’assurer la qualité commerciale des productions végétales en Wallonie et la gestion des risques pour les producteurs et les jardiniers. En effet, la pratique du jardinage est en recrudescence et elle démontre plusieurs bienfaits physiques, sociaux, psychiques, etc. Cependant, l’autoproduction en jardins collectifs ou privatifs se heurte aux interrogations grandissantes quant aux risques sanitaires liés à la pollution en métaux (arsenic, cadmium, mercure, plomb, zinc, etc.) relevée dans certains sols en Wallonie (provenant des activités industrielles historiques ou du fond pédogéochimique naturel). Au terme du projet, un outil informatique disponible sur Internet, sera capable d’émettre des recommandations sur les productions végétales réalisées sur une parcelle qui aurait fait l’objet d’une analyse de sol, voire de légumes (Figure 1). Par le biais d’un questionnaire, l’utilisateur fournit diverses informations telles que : les concentrations en métaux dans le sol ainsi que le type de légumes ou fruits autoproduits, ses habitudes alimentaires, la fréquentation du jardin potager, etc. Sur base de ces données, un modèle d’évaluation des risques construit à partir d’équations de transfert sols-plantes, de valeurs toxicologiques de références, de valeurs de bioaccessibilité spécifiques à chaque métal générera des recommandations en matière de production végétale et de gestion à la parcelle. [less ▲]

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See detailInfluence of edaphic conditions and nitrogen fertilizers on cadmium and zinc phytoextraction efficiency of Noccaea caerulescens
Jacobs, Arnaud; Noret, N.; Van Baekel, A. et al

in Science of the Total Environment (2019), 665

The success of cadmium phytoextraction operations with Noccaea caerulescens varies by a factor of 70 between sites of trials. However, soil factors driving the efficiency of cadmium (Cd) and zinc (Zn ... [more ▼]

The success of cadmium phytoextraction operations with Noccaea caerulescens varies by a factor of 70 between sites of trials. However, soil factors driving the efficiency of cadmium (Cd) and zinc (Zn) phytoextraction are still poorly understood, as are the effects of nitrogen fertilizers. We studied biomass production and Cd and Zn uptake by two contrasting populations of N. caerulescens, Ganges (metallicolous) and Wilwerwiltz (non-metallicolous) grown in pots on a range of 24 field contaminated soils for 20 weeks. The addition of KNO 3 and NH 4 NO 3 fertilizers was also tested. Using model averaging of multiple regression models, we show that the major drivers of N. caerulescens growth are physical soil factors such as organic matter and soil bulk density while trace metal accumulation mainly relies on soil Cd and Zn exchangeable concentrations. We confirm the negative effect of soil copper (Cu) on growth, even at exchangeable concentrations below 30 mg kg −1 , and therefore on uptake efficiency, while increasing soil lead (Pb) content was related to increased biomass probably due to a protective effect against soil pathogens. Finally, there is a small positive effect of nitrogen fertilization on biomass production only in soils with low initial nitrogen content (under 25 μg g −1 NO 3 − ), while above this value, the positive impact of initial nitrogen content is offset by lower shoot Cd and Zn concentrations. Our data bring substantial information regarding the physico-chemical properties to ensure N. caerulescens growth: a soil bulk density under 1.05 kg/dm 3 , organic matter above 7% and pH under 7.5. We show that phytoextraction efficiency is maximal for moderate soil contamination in Cd (2–10 mg kg −1 ) and Zn (300–1000 mg kg −1 ). © 2019 Elsevier B.V. [less ▲]

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See detailMobility of copper and cobalt in metalliferous ecosystems: Results of a lysimeter study in the Lubumbashi Region (Democratic Republic of Congo)
Kaya Muyumba, Donato ULiege; Pourret, Olivier; Liénard, Amandine ULiege et al

in Journal of Geochemical Exploration (2019), 196

This paper presents the results of a lysimeter experiment in which a forest soil has been artificially spiked with rock fragments from natural copper (Cu) and cobalt (Co)-hills from Tenke-Fungurume ... [more ▼]

This paper presents the results of a lysimeter experiment in which a forest soil has been artificially spiked with rock fragments from natural copper (Cu) and cobalt (Co)-hills from Tenke-Fungurume (Democratic Republic of Congo). The Cu and Co contents of the percolating water have been analysed at repeated intervals and the impact of rock on the soil properties was evaluated at the end of the experiment. Five rocks were sampled in one copper hill. In natural conditions, these rock fragments located on the top of the hill are mixed to surface soil horizon along the slope through colluvial processes. The Cu and Co contents in rocks range respectively between 470 mg/kg (siliceous rock) and 140,000 mg/kg (shale) and between 450 mg/kg (dolostone) and 5,300 mg/kg (shale). Rock fragments were mixed with two horizons (hemi-organic A with 2.7% total organic carbon (TOC), and mineral B with 0.3% TOC) of an acid (pH water < 4.5) acrisol under forest. The mixture was placed in 1 L lysimeters and left in Lubumbashi ex situ conditions during the rainy season. Percolating water was collected for six periods after and the Cu and Co contents have been analysed. At the end of the experiment, soil from the lysimeter was removed for pH, TOC, available nutrients and trace elements, CaCl2-extractable Cu and Co analysis. The results show great differences between Cu and Co releases in the percolating solutions according to the nature of the rocks. The quantities released were correlated to the concentrations originally present in the unweathered rocks. Differences were also found between the A and B horizons, which indicate that the physicochemical properties of the soil influence reaction with the rocks. The differences between both horizons are mainly organic carbon content, cationic exchange capacity and nutrient content, which were higher in the A horizon. However, the pH of the A horizon was acidic compared with the B horizon. Significant correlations were found between extractable Cu and Co with concentrations of their leaching solution. Because of this, soluble Cu and Co extracted by CaCl2 can be regarded as vertical transfer risk prediction tools of Cu and Co in the soil. [less ▲]

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See detailLa dépollution des sols par phytoremédiation
Liénard, Amandine ULiege

Conference given outside the academic context (2018)

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See detailTransfert des polluants du sol vers les plantes potagères
Liénard, Amandine ULiege; Colinet, Gilles ULiege

Conference given outside the academic context (2018)

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See detailEvaluation of sanitary risks versus benefits of gardening in urban areas : a case study in Belgium
Colinet, Gilles ULiege; Liénard, Amandine ULiege; Marloie, Marcel et al

Conference (2018, April 18)

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See detailChapitre 10. Evaluation expérimentale de la phytodisponibilité du cuivre et du cobalt dans les sols des écosystèmes métallifères de l’Arc cuprifère katangais
Kaya Muyumba, Donato ULiege; Pourret, Olivier; Liénard, Amandine ULiege et al

in Bogaert, Jan; Colinet, Gilles; Mahy, Grégory (Eds.) Anthropisation des paysages katangais (2018)

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See detailSoil contamination in kitchen gardens of urban areas: the need for comprehensive approaches
Colinet, Gilles ULiege; Liénard, Amandine ULiege; Goidts, Esther et al

in Proceedings (2018)

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See detailChapitre 9. Phytostabilisation des sols contaminés au Katanga : résultats d’expérimentations sur la sélection d’espèces ligneuses combinée à des doses croissantes d’amendements1
Mpundu Mubemba, ichel; Liénard, Amandine ULiege; Ngoy Shutcha, Mylor et al

in Bogaert, Jan; Colinet, Gilles; Mahy, Grégory (Eds.) Anthropisation des paysages katangais (2018)

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See detailQualité des sols, pratiques agricoles et perception des services rendus par les jardins potagers : cas d’études en jardins collectifs.
Colinet, Gilles ULiege; Barbieux, Sophie; Leyh, Romain et al

Report (2018)

Collective gardens were studied in four different areas: The Walloon region, Brussels, Paris and Manchester within the “Urban Soils” project. The study aimed at deciphering relationships between gardener ... [more ▼]

Collective gardens were studied in four different areas: The Walloon region, Brussels, Paris and Manchester within the “Urban Soils” project. The study aimed at deciphering relationships between gardener practices, soil quality and perception of services provided by collective urban gardening. Three questionnaires dedicated respectively to motivation, usage and perceptions were set up and filled with the stakeholders: the garden management on the one side and the gardeners on the other side. Soil samples were taken on a voluntary basis in order to characterize soil fertility and metal contamination. Every case study appeared specific and deeper characterization of sanitary risks was needed in one city. [less ▲]

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See detailEvaluation des risques pour la santé humaine - Jardin collectif « Le coin de terre de Bressoux »
Liénard, Amandine ULiege; Colinet, Gilles ULiege

Report (2018)

As part of the project “Urban soils”, a risk evaluation of human health is realized on the collective garden the “Coin de terre” of Bressoux. This collective garden has previously been characterized ... [more ▼]

As part of the project “Urban soils”, a risk evaluation of human health is realized on the collective garden the “Coin de terre” of Bressoux. This collective garden has previously been characterized (fertility and metal contamination) during the “Urban soils” subvention along with 39 other collective gardens in Wallonia. The methodology applied on the site of the collective garden of Bressoux follows the recommended methodology in Walloon region and is as close to reality as possible. To do so, the data used during the risk evaluation are contents measured on soils, vegetables and fruits sampled on the site. This analysis shows that levels of exposure via soil and dust ingestion, ingestion of fruits and vegetables, dermal exposure, and inhalation of soil particles (dust movements) are considered acceptable for children, adult gardeners and adult visitors for the following elements: cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), molybdenum (Mo), nickel (Ni) and zinc (Zn). On the other hand, the results indicate that acceptability thresholds for arsenic (As) and lead (Pb) are exceeded for children and adults frequenting the garden and / or consuming vegetables and fruits produced on the garden. On one hand, the comparison of the contents of cadmium and lead measured in vegetables and fruits of the collective garden with the marketing standards set out in European Regulation (EC) No 1881/2006 indicates that all leafy vegetables (chard, green cabbage, and lettuce), root vegetables (beetroot, carrot, turnip, and parsnip), tuber vegetables (potatoes), herbs (basil, mint, and parsley), beans, and peppers systematically exceed the standard in cadmium and / or lead. On the other hand, fruit vegetables such as cucumbers, gherkins, zucchini, peppers, and tomatoes as well as fruits (figs, blackberries, plums, grapes, and greengage) do not in any way exceed the marketing standards for cadmium and lead. However, the median concentrations measured on all the productions of the garden are systematically higher than those measured in Belgian food trades by the FASFC. In conclusion, the recommendations advocated to all users of the collective garden of Bressoux in order to respect the precautionary principle are as follows: 1. Avoid eating the vegetables and fruits produced on the site of the Bressoux collective garden except for tomatoes, zucchini, and grapes, only after thorough washing and peeling for zucchini. Make sure to diversify as much as possible the origin of the vegetables and fruits consumed. This recommendation applies to children and adults. 2. Avoid taking small children (under 6 years old) to the site. The main route of exposure to contaminants of children under 6 is ingestion of soil and dust via direct hand-to-mouth contact. 3. For adults and children, be sure to limit soil ingestion by direct hand-to-mouth contact [less ▲]

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See detailTransfert en cadmium et zinc vers l’orge de printemps en sols contaminés et non contaminés de Belgique : évaluation et prédiction
Liénard, Amandine ULiege; Colinet, Gilles ULiege

in Cahiers Agricultures (2018), 27(2),

In the Walloon region (Belgium), agricultural soils close to a former ore smelter were affected by atmospheric deposition contaminated by cadmium (Cd), lead (Pb), and zinc (Zn). To study the effect of ... [more ▼]

In the Walloon region (Belgium), agricultural soils close to a former ore smelter were affected by atmospheric deposition contaminated by cadmium (Cd), lead (Pb), and zinc (Zn). To study the effect of these contaminations on the quality of agricultural productions, a study of the transfer from soil to a cereal crop, barley (Hordeum vulgare L.) was carried out on one of these contaminated areas and an uncontaminated control area. Eighteen barley samples were taken in contaminated areas; 10 were sampled in the control area, and each was subdivided into three subsamples (stem, ear, and seed). A sample was taken from topsoil horizon (0 to 20 cm) at the location of each plant sample. Available and pseudo-total concentrations of trace and major elements as well as pHwater, pHKCl, total organic carbon, and total nitrogen were measured on the soil samples. Concentrations of Cd and Zn were measured in the seed, ear, and stem. The concentrations of Cd and Zn that were measured in the harvested plants in the contaminated zone are 2 to 9 times higher than those measured in the control barleys. There are few relationships between Cd concentration in seeds (CdSeed), Zn concentration in seeds (ZnSeed), and soil properties apart from available and pseudo-total soil levels of Cd and Zn. Using a Cate-Nelson analysis, CdSeed was estimated at 0.027 mg Cd/kg of dry matter (DM) for pseudo-total soil Cd levels ranging from 0 to 1.23 mg/kg, and at 0.118 mg Cd/kg DM for pseudo-total soil Cd levels ranging from 1.24 to 6.87 mg/kg. ZnSeed is estimated to be 19.2 mg/kg of DM for soil ranges from 0 to 131 mg/kg of pseudo-total Zn, and 40 mg/kg of DM for soil ranges from 132 to 570 mg/kg of pseudo-total Zn. However, an estimate of the transfer of Cd and Zn remains complex in these multi-contaminated soils. [less ▲]

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See detailElemental composition of soils and sediments by using portable X-ray fluorescence (pXRF) spectroscopy: a preliminary study
Alberti, Roberto; Falsone, Gloria; Gironda, M. et al

Poster (2017, December)

Portable X-ray fluorescence spectrometry (pXRF) provides rapid and low-cost analysis in laboratory and field conditions for a wide range of environmental applications. Its successful application in soils ... [more ▼]

Portable X-ray fluorescence spectrometry (pXRF) provides rapid and low-cost analysis in laboratory and field conditions for a wide range of environmental applications. Its successful application in soils requires a good instrument calibration and the possibility to implement custom calibrations and methods using known samples as well as reference materials. In the present study two set of samples, one from pedogenized sediments of a basin in Marradi (Italy; n=13) and the other from agricultural land in Meuse valley (Belgium; n=10), were analyzed by using a portable X-ray fluorescence (pXRF TRACER 5i made by Bruker) to detect and quantify the element species (Al, Si, Ca, Fe, Mg, K, Mn, P, S, Ba, Cd, Co, Cr, Cu, Mo, Pb, Sb, Sn, Sr and Zn). Element concentrations results were compared with analytical results from aqua regia extractions (AQ) followed by ICP-OES analysis. The aim of this work was to verify and find the best instrument setup for the specific matrix, elements and their concentration range with the purpose of using the pXRF technique directly insitu for the screening of sites potentially polluted. A standard factory calibration for soil applications was used for samples from Meuse valley, while a custom calibration for P, S, Ca and Fe quantification with the coefficient correction method was developed and used for pedogenized sediments from Marradi, as well as for Cu and Cr quantification in both sites. Comparing portable XRF and AQ results, elements could be grouped in three classes: 1) elements where the content determined by both methods is not correlated (p>0.05; Al, Si, and K); 2) elements strongly correlated (0.84<r<0.99, p<0.001; P, S, Mn, Fe, Ca, Cu, Cr, Zn and Pb); 3) elements with a weaker correlation (0.67<r<0.78, p<0.01; Mg and Sr). A further class of elements (Co, Mo, Cd, Sn, Sb, and Ba) was not evaluable because their concentration was below the detection limit of the pXRF. The measured concentrations and the relationship between pXRF and AQ were obviously affected by the elements form in the soils. The value of macroelements commonly related to the silicate phase measured by portable XRF is higher than that determined by AQ, which does not allow the destruction of Si-O and Al-O bounds (explaining the uncorrelation in the class 1 elements). The elements related to the organic matter (P and S, r2>0.60), carbonates (Ca, r2>0.55) and oxy(hydr)oxides (Fe and Mn) have instead comparable concentrations between pXRF and AQ. Preliminary results showed that portable XRF can quickly provide data for some elucidations of important pedogenic processes involving many elements (class 2) in the studied soils. Alternative methods offer results after expensive and time-consuming analytical procedures. Moreover for environmental and human health purposes, the pXRF should be a valid tool for a rapid screening of heavy metals, such as Cu, Cr, Zn and Pb. A larger set of soil samples and further custom calibration will be tested. [less ▲]

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See detailServices and dis-services of collective gardens in urban areas: a soil perspective
Colinet, Gilles ULiege; Liénard, Amandine ULiege; Schram, Dieneke et al

Conference (2017, November 23)

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See detailImpacts de contaminations sur la végétation et la faune du sol
Liénard, Amandine ULiege

Conference given outside the academic context (2017)

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See detailTreatment MEthodology and MOnitoring for sequenced Reallocation of severely polluted Industrial Sites (MEMORIS) project
Duprez, Marie-Eve; Castro, Cristiana; Devalckeneer, Aude et al

Poster (2017, May)

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See detailTransfert sol-plante et Procédés de phytoremédiation (Memoris)
Liénard, Amandine ULiege

Conference given outside the academic context (2017)

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